3D printing light device and 3D printer

Abstract

The present disclosure relates to a 3D printing illumination device and a 3D printer, the 3D printing illumination device comprising: a light source assembly for emitting parallel light; a modulation assembly located on the light emitting side of the light source assembly, the modulation assembly being configured to receive an electric driving signal and modulate the parallel light emitted by the light source assembly based on the electric driving signal; and a light homogenizing assembly located on the side of the modulation assembly away from the light source assembly along the light transmission direction, the light homogenizing assembly being configured to scatter the modulated light emitted by the modulation assembly. According to the present disclosure, the pixel boundaries of the gray scale image projected by the modulation assembly can be slightly and uniformly diffused, thereby reducing or eliminating the gap between adjacent pixels in the gray scale image projected by the modulation assembly, so that the 3D printing illumination device finally projects a more uniform gray scale image, thereby reducing the surface detail difference between the printed physical model and the designed three-dimensional digital model, and improving the 3D printing quality.

Description

Technical Field

[0001] This disclosure relates to the field of 3D printing technology, and more particularly to a 3D printing illumination device and a 3D printer. Background Technology

[0002] 3D printing technology is a type of rapid prototyping technology. It involves breaking down a computer-designed 3D digital model into several planar slices, and then using a 3D printer to stack powdered, liquid, or filamentous plastics, metals, ceramics, or sand and other bondable materials layer by layer according to the slice pattern, ultimately creating a complete object.

[0003] In the field of 3D printing technology, when using existing 3D printing lighting devices, the surfaces of the printed physical model and the designed 3D digital model often differ in detail, resulting in low 3D printing quality. Currently, there is no effective solution to this problem. Summary of the Invention

[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this disclosure provides a 3D printing illumination device and a 3D printer.

[0005] This disclosure provides a 3D printing illumination device, including:

[0006] Light source assembly, used to emit parallel light;

[0007] A modulation component is located on the light-emitting side of the light source component. The modulation component is used to receive an electric drive signal and modulate the parallel light emitted by the light source component based on the electric drive signal.

[0008] A light-diffusing component is located on the side of the modulation component away from the light source component along the light transmission direction. The light-diffusing component is used to scatter the modulated light emitted by the modulation component.

[0009] In some embodiments, the light source assembly includes:

[0010] A light source is used to emit light;

[0011] A freeform lens is located on the light-emitting side of the light source and covers the light source. The freeform lens is used to converge and disperse the light emitted from the light source based on different light-emitting surfaces.

[0012] A Fresnel lens, along the direction of light transmission, is located on the side of the freeform lens opposite to the light source. The Fresnel lens is used to collimate the light rays emitted from the freeform lens to obtain parallel light.

[0013] In some embodiments, the modulation component includes an LCD or DLP device.

[0014] In some embodiments, the light-diffusing component is in the form of a film, and the film-shaped light-diffusing component includes a light-diffusing film, light-diffusing glass, or a PTFE film.

[0015] In some embodiments, the light-diffusing film includes:

[0016] The substrate and the diffuser particles are located on the side of the substrate away from the modulation component along the direction of light transmission.

[0017] In some embodiments, the diffused particles are spherical, and the homogenizing film includes diffused particles of at least two diameters.

[0018] In some embodiments, the substrate and the diffused particles are integrally formed; or, the substrate and the diffused particles are separately formed and the diffused particles are coated on the substrate.

[0019] In some embodiments, the materials of the substrate and the diffused particles include PET.

[0020] In some embodiments, the light homogenizing component includes a diffraction grating or a microprism array.

[0021] This disclosure also provides a 3D printer including any of the above-described 3D printing illumination devices.

[0022] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0023] The 3D printing illumination device provided in this disclosure includes: a light source assembly for emitting parallel light; a modulation assembly located on the light-emitting side of the light source assembly, the modulation assembly receiving an electric drive signal and modulating the parallel light emitted by the light source assembly based on the electric drive signal; and a light-diffusing assembly located on the side of the modulation assembly away from the light source assembly along the light transmission direction, the light-diffusing assembly scattering the modulated light emitted by the modulation assembly. As can be seen, by adopting the above technical solution, the modulation assembly can modulate the parallel light emitted by the light source assembly to initially project a grayscale image, and the light-diffusing assembly can scatter the modulated light emitted by the modulation assembly to achieve minute and uniform diffusion at the pixel boundaries of the grayscale image projected by the modulation assembly, making the boundaries between pixels in the final projected grayscale image uniform, and the transition of grayscale values ​​more continuous. This allows the 3D printing illumination device to ultimately project a more uniform grayscale image, thus reducing the surface detail differences between the printed physical model and the designed 3D digital model, and improving the 3D printing quality. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0025] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a 3D printing illumination device provided in an embodiment of the present disclosure;

[0027] Figure 2 This is a schematic diagram of the structure of a light-diffusing film provided in an embodiment of the present disclosure;

[0028] Figure 3 A schematic diagram of another 3D printing illumination device provided in an embodiment of this disclosure;

[0029] Figure 4 This is a schematic diagram of a grayscale image provided in an embodiment of the present disclosure.

[0030] Among them, 110, light source assembly; 111, light source; 112, freeform lens; 1121, first light-emitting surface; 1122, second light-emitting surface; 1123, third light-emitting surface; 1124, fourth light-emitting surface; 1125, first connecting surface; 1126, second connecting surface; 113, Fresnel lens; 114, support base; 120, modulation assembly; 130, light homogenizing assembly; 131, substrate; 132, diffusion particles; 210, printing platform; 310, blank film. Detailed Implementation

[0031] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0032] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0033] First, the relevant technologies and their defects, as well as the solutions proposed in this disclosure for improvement, will be briefly described.

[0034] As described in the background section, when using existing 3D printing lighting devices for 3D printing, there are often differences in detail between the printed physical model and the designed 3D digital model. These differences may manifest in aspects such as the printed physical model not appearing transparent. Specifically, when using transparent resin for 3D printing, the surface of the printed physical model will have a frosted effect, making the printed physical model appear opaque. Therefore, the surface needs to be polished later to make the printed physical model more transparent. However, the polishing process consumes a lot of manpower.

[0035] Regarding the issue of "differences in surface detail between the printed physical model and the designed 3D digital model," the applicant's research revealed that the main cause is the significant gaps between adjacent pixels in the grayscale image projected by existing 3D printing lighting equipment, and the unevenness of the grayscale image's edges. Therefore, it is necessary to perform uniform lighting processing on the grayscale image to improve the problems of significant gaps between adjacent pixels and uneven edges. For the unevenness of grayscale image edges, the uniform lighting algorithm built into the slicing software can be used to optimize the edges of the sliced ​​image used for 3D printing. This allows for a more uniform transition in the edges of the grayscale image projected by the 3D printing lighting equipment based on the sliced ​​image, resulting in a smoother surface transition of the printed physical model and reducing the formation of layer lines. However, there is currently no effective solution for the problem of significant gaps between adjacent pixels.

[0036] In view of this, the present disclosure provides a 3D printing illumination device and a 3D printer, which can reduce or eliminate the gap between adjacent pixels in a grayscale image, thereby reducing the difference in surface detail between the printed physical model and the designed three-dimensional digital model and improving the 3D printing quality.

[0037] The 3D printing illumination device and 3D printer provided in the embodiments of this disclosure will be described by way of example below with reference to the accompanying drawings.

[0038] Figure 1 This is a schematic diagram of the structure of a 3D printing illumination device provided in an embodiment of the present disclosure, with reference to... Figure 1 The 3D printing illumination device includes: a light source assembly 110 for emitting parallel light; a modulation assembly 120 located on the light-emitting side of the light source assembly 110, the modulation assembly 120 for receiving an electric drive signal and modulating the parallel light emitted by the light source assembly 110 based on the electric drive signal; and a light homogenizing assembly 130 located along the light transmission direction on the side of the modulation assembly 120 away from the light source assembly 110, the light homogenizing assembly 130 for scattering the modulated light emitted by the modulation assembly 120.

[0039] Specifically, the specific structure of the light source assembly 110 can be set by those skilled in the art according to the actual situation, and is not limited here. Typical examples are described below, but they do not constitute a limitation of this disclosure.

[0040] It should be noted that the parallel light mentioned here refers to a light beam with an angle less than or equal to a preset angle, which can be 5°, etc., but is not limited to this.

[0041] In some embodiments, see continue to see Figure 1 The light source assembly 110 may include a light source 111 for emitting light; a freeform lens 112 located on the light-emitting side of the light source 111 and covering the light source 111, the freeform lens 112 being used to converge and disperse the light emitted from the light source 111 based on different light-emitting surfaces; and a Fresnel lens located on the side of the freeform lens 112 away from the light source 111 along the light transmission direction, the Fresnel lens being used to collimate the light emitted from the freeform lens 112 to obtain parallel light.

[0042] Specifically, any light source 111 known to those skilled in the art can be used. For example, the light source 111 can be a chip-on-board (COB) light source 111, which reduces cost and increases integration. The emission wavelength of the light source 111 can be in the 380nm-450nm range. For instance, an ultraviolet light-emitting diode (UV-LED) can be selected as the light source 111, with a center wavelength of 405nm, but it is not limited to this.

[0043] Specifically, with Figure 1 Taking the shown orientation and structure as an example, the freeform lens 112 is located above the light source 111 and covers the entire light source 111. In this way, it can be ensured that all the light emitted by the light source 111 can be received by the freeform lens 112, thereby enabling the overall light to be homogenized. Any freeform lens 112 or light source 111 known to those skilled in the art can be used.

[0044] For example, see [link to example]. Figure 1The freeform lens 112 includes a first light-emitting surface 1122, a second light-emitting surface 1123, a third light-emitting surface 1123, a fourth light-emitting surface 1124, a first connecting surface 1125, and a second connecting surface 1126; the second light-emitting surface 1123 connects the first light-emitting surface 1122 and the third light-emitting surface 1123; the first connecting surface 1125 connects the first light-emitting surface 1122 and the fourth light-emitting surface 1124; and the second connecting surface 1126 connects the third light-emitting surface 1123 and the fourth light-emitting surface 1124. The first light-emitting surface 1122, the second light-emitting surface 1123, and the third light-emitting surface 1123 are away from the light source 111; the fourth light-emitting surface 1124 faces the light source 111; the fourth light-emitting surface 1124 is used to allow light emitted from the light source 111 to pass through; the second light-emitting surface 1123 is used to disperse light within a first divergence angle range; the first light-emitting surface 1122 and the third light-emitting surface 1123 are used to converge light within a second divergence angle range; wherein, the first divergence angle range is smaller than the second divergence angle range.

[0045] The first light-emitting surface 1122, the third light-emitting surface 1123, and the fourth light-emitting surface 1124 are convex surfaces; the second light-emitting surface 1123 is concave; the first light-emitting surface 1122 and the third light-emitting surface 1123 are symmetrically distributed with the fourth light-emitting surface 1124 as a reference surface; the first connecting surface 1125 and the second connecting surface 1126 are planar surfaces. Since the fourth light-emitting surface 1124 is convex, the area below the fourth light-emitting surface 1124 is empty, which can accommodate and cover the light source 111. For example, the fourth light-emitting surface 1124 is semi-circular, and its center of curvature coincides with the light-emitting center of the light source 111. In this way, the luminous flux distribution of the irradiated surface can be optimized, making the overall light more uniform.

[0046] The light rays emanating from the fourth light-emitting surface 1124 have different divergence angles. To avoid uneven irradiation, the second light-emitting surface 1123 disperses the light rays within the first divergence angle range, while the first light-emitting surface 1122 and the third light-emitting surface 1123 converge the light rays within the second divergence angle range. In this way, the overall distribution of light rays becomes more uniform.

[0047] The first divergence angle can range from 0° to 30°, and the second divergence angle can range from 30° to 90°, but is not limited to these ranges.

[0048] It is understandable that when the light source 111, such as an ultraviolet light-emitting diode, emits light, the light intensity at the center of the ultraviolet light-emitting diode is the greatest. As the divergence angle increases, the light intensity gradually weakens, resulting in uneven irradiation. When a freeform lens 112 is placed above the ultraviolet light-emitting diode, the light emitted by the ultraviolet light-emitting diode is converged and dispersed through different light-emitting surfaces (or surfaces) of the freeform lens 112, thereby ensuring that the light emitted from the freeform lens 112 is more uniform, which is beneficial to improving the quality of 3D printing.

[0049] Specifically, the distance between the Fresnel lens 113 and the light source 111 can be determined based on the actual collimation distance of the Fresnel lens 113, which is determined by the focal length of the Fresnel lens 113 and the focal length of the freeform lens 112. In this way, a good degree of collimation can be achieved for the uniform light emitted from the freeform lens 112, resulting in a light output with high parallelism.

[0050] See also Figure 1 Optionally, the light source assembly 110 also includes a support base 114 for supporting and fixing the freeform lens 112 and the light source 111.

[0051] Specifically, with Figure 1 Taking the shown orientation and structure as an example, the light source 111 is disposed on the upper surface of the support base 114, and the freeform lens 112 covers the light source 111 and is disposed on the upper surface of the support base 114. The support base 114 can be a cubic structure, a cylindrical structure, etc., but is not limited to these.

[0052] Of course, in other embodiments, the light source assembly 110 may also include a UV matrix light source 111.

[0053] Specifically, the modulation component 120 can project the parallel light emitted from the light source component based on the electric drive signal, thereby initially projecting a grayscale image.

[0054] Specifically, the specific structure of the modulation component 120 can be set by those skilled in the art according to actual conditions, and is not limited here. Typical examples are described below, but they do not constitute a limitation of this disclosure.

[0055] In some embodiments, modulation component 120 may include an LCD.

[0056] Specifically, the light-projecting area of ​​the LCD includes a liquid crystal solution located between two polarized materials. Since an electrical driving signal (corresponding to a sliced ​​image) can control the crystal arrangement to allow or block light, each crystal acts like a Venetian blind, allowing or blocking light under the control of the corresponding electrical driving signal. Thus, the light-projecting area of ​​the LCD can modulate the parallel light emitted from the light source assembly 110 based on the electrical driving signal. In other words, it allows some parallel light rays to pass through while blocking others (i.e., selective light transmission), thereby projecting a grayscale image corresponding to the electrical driving signal. This allows the resin to undergo a photocuring reaction, printing a layer corresponding to the pattern in the grayscale image.

[0057] In other embodiments, modulation component 120 may include a digital light processing (DLP) device.

[0058] For example, a DLP device may include an optical engine DLP, but is not limited thereto.

[0059] Specifically, the distance between the modulation component 120 and the light source 111 can be set by those skilled in the art according to the actual situation, and is not limited here.

[0060] Specifically, the light-diffusing component 130 covers at least a portion of the light-projection area of ​​the modulation component 120. Preferably, the light-diffusing component 130 covers the entire light-projection area of ​​the modulation component 120.

[0061] Specifically, the distance between the light-diffusing component 130 and the modulation component 120 can be set by those skilled in the art according to the actual situation, and is not limited here.

[0062] It is understandable that, as mentioned above, there are obvious gaps between adjacent pixels in a grayscale image projected using existing 3D printing lighting devices. In this embodiment, by setting the uniform light component 130, the modulated light transmitted from the modulation component 120 can be scattered, thereby causing a small, uniform diffusion of each grayscale pixel in the grayscale image. This reduces or eliminates the gaps between adjacent pixels in the grayscale image, making the boundaries between pixels in the final projected grayscale image more uniform, and the transition of grayscale values ​​more continuous. This, in turn, reduces the difference in surface detail between the printed physical model and the designed 3D digital model, improving the quality of 3D printing. For example, when printing with transparent resin, the 3D printing lighting device provided in this embodiment can reduce or eliminate grayscale textures on the surface of the printed physical model, thereby improving the transparency of the printed physical model.

[0063] Specifically, the specific structure of the light-diffusing component 130 can be set by those skilled in the art according to actual conditions, and this disclosure does not limit it. Typical examples are described below, but they do not constitute a limitation of this application.

[0064] In some embodiments, the light-diffusing component is in the form of a film, which may include a light-diffusing film, light-diffusing glass, or a PTFE film.

[0065] Figure 2 This is a schematic diagram of the structure of a light-diffusing film provided in an embodiment of this disclosure. Figure 2 As shown, the light-diffusing film includes a substrate 131 and diffuser particles 132. Along the light transmission direction, the diffuser particles 132 are located on the side of the substrate 131 away from the modulation assembly 120.

[0066] Specifically, the substrate 131 is used to carry the diffuse particles 132, which are used to scatter the modulated light emitted from the modulation component 120 and passing through the substrate 131, thereby causing small and uniform diffusion of each grayscale pixel in the grayscale image, thereby reducing or eliminating the gap between adjacent pixels in the grayscale image.

[0067] Specifically, the specific shape of the substrate 131 can be set by those skilled in the art according to the actual situation, and is not limited here. For example, the orthographic projection of the substrate 131 on the modulation component 120 has the same shape as the light projection area of ​​the modulation component 120. For example, if the light projection area of ​​the modulation component 120 is rectangular, the substrate 131 can be in the form of a rectangular film and the rectangular area of ​​the substrate 131 is greater than or equal to the rectangular area of ​​the light projection area of ​​the modulation component 120, but it is not limited to this.

[0068] Specifically, the specific shape of the diffuser particles 132 can be set by those skilled in the art according to actual conditions, and is not limited here. Optionally, the diffuser particles 132 are spherical, which makes the preparation process of the diffuser particles 132 relatively simple and helps to reduce the preparation cost of the diffuser particles 132. Further optionally, the homogenizing film includes diffuser particles 132 of at least two diameters, so that the diffuser particles 132 can scatter the modulated light more fully, making the diffusion effect at the boundary between pixels in the grayscale image more uniform, thereby better reducing or eliminating the gap between adjacent pixels in the grayscale image.

[0069] Specifically, the substrate 131 and the diffusing particles 132 can be integrally formed, which reduces the preparation steps of the homogenizing film, helps to reduce the preparation cost, and the connection between the substrate 131 and the diffusing particles is more reliable, which helps to reduce the risk of the diffusing particles 132 peeling off from the substrate 131 and improves the life of the homogenizing film.

[0070] Of course, the substrate 131 and the diffusion particles 132 can also be formed separately and the diffusion particles 132 can be coated on the substrate 131. In this way, the difficulty of preparing the uniform light film can be reduced, the preparation cost can be reduced, and the number and position of the diffusion particles 132 on the substrate 131 can be flexibly set.

[0071] Specifically, the materials of the substrate 131 and the scattering particles can be set by those skilled in the art according to the actual situation, and are not limited here. Optionally, the materials of the substrate 131 and the scattering particles 132 include PET. Since PET has good transparency and light transmittance, with a light transmittance of over 90%, the light-diffusing film made of PET material can better scatter and transmit the modulated light emitted from the modulation component 120, which is beneficial to reducing light energy loss.

[0072] Of course, in other examples, the diffused particles 132 can also be located inside the substrate 131. In this way, the substrate 131 can also protect the diffused particles 132 and prevent the diffused particles 132 from being worn down, thus affecting the diffusion effect.

[0073] Of course, in some other examples, some of the diffuse particles 132 are located inside the substrate 131, and some of the diffuse particles 132 are located on the side of the substrate 131 opposite to the modulation component 120 along the direction of light transmission.

[0074] For example, when performing 3D printing, Figure 1 The working principle of the 3D printing illumination device shown is as follows: When the light emitted from the light source 111 is transmitted to the freeform lens 112, the freeform lens 112 can converge and disperse the light emitted from the light source 111 to make the overall light more uniform. When the light transmitted from the freeform lens 112 is transmitted to the Fresnel lens 113, the Fresnel lens 113 can collimate the freeform lens 112 and output parallel light. When the parallel light is transmitted to the modulation component 120, the modulation component 120 can modulate the parallel light based on the received electrical drive signal to project a grayscale image. When the light transmitted from the modulation component 120 is transmitted to the homogenizing film, it will be scattered under the action of the diffusing particles 132, which makes the boundaries between the pixels of the grayscale image uniform and the transition of grayscale values ​​more continuous, thus making the grayscale image finally projected onto the printing platform 210 more uniform.

[0075] To demonstrate the effect of the homogenizing film on reducing the gap between adjacent pixels in a grayscale image, for example, Figure 3 This is a schematic diagram of another 3D printing illumination device provided in an embodiment of the present disclosure. Figure 4 This is a schematic diagram of a grayscale image provided in an embodiment of this disclosure. Figure 3 and Figure 4 As shown, a homogenizing film is installed on one half of the projection area of ​​the modulation component 120, and a blank film 310 is installed on the other half as a control. Light emitted from the modulation component 120 passes through the blank film 310 and is projected onto the printing platform 210 to obtain the original grayscale image. Light emitted from the modulation component 120 passes through the homogenizing film and is projected onto the printing platform 210 to obtain a homogenized grayscale image. Figure 4 The two grayscale image results shown in the figure show that the transition between adjacent pixels at the gap JX1 in the original grayscale image is very uneven and the texture is obvious. However, the transition between adjacent pixels at the gap JX2 in the grayscale image after homogenization by the light-diffusing film has a significant optimization effect. Therefore, the use of the light-diffusing film can make the surface transition of the printed physical model smoother and reduce the generation of layer texture, thereby improving the transparency.

[0076] Specifically, any uniform glass known to those skilled in the art can be used, as long as it can achieve a more uniform diffusion effect at the boundaries between pixels in the grayscale image.

[0077] Specifically, PTFE membrane is a microporous film produced by special processes such as premixing, extrusion, calendering, and biaxial stretching of polytetrafluoroethylene dispersion resin.

[0078] It is understandable that when light transmitted from the modulation component 120 is transmitted to the PTFE film, scattering will occur due to the microporous structure of the PTFE film. This will make the boundaries between pixels of the grayscale image more uniform and the transition of grayscale values ​​more continuous, thus making the grayscale image projected onto the printing platform 210 more uniform.

[0079] Of course, in other embodiments, the homogenizing component 130 may also include a diffraction grating.

[0080] Specifically, any diffraction grating known to those skilled in the art can be used, as long as it can achieve a more uniform diffusion effect at the boundaries between pixels in the grayscale image.

[0081] Of course, in some other embodiments, the light-diffusing component 130 may also include a microprism array.

[0082] Specifically, any microprism array known to those skilled in the art can be used, as long as it can achieve a more uniform diffusion effect at the boundaries between pixels in the grayscale image.

[0083] Based on the above embodiments, this disclosure also provides a 3D printer, including any of the 3D printing illumination devices provided in the above embodiments, which has corresponding beneficial effects.

[0084] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0085] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A 3D printing light device, characterized in that, The application relates to a 3D printing light source device, comprising: a light source assembly for emitting parallel light; a modulation assembly located on the light emitting side of the light source assembly, the modulation assembly being used for receiving an electric driving signal and modulating the parallel light emitted by the light source assembly based on the electric driving signal; a light homogenizing assembly located on the side of the modulation assembly away from the light source assembly in the light transmission direction, the light homogenizing assembly being used for scattering the modulated light emitted by the modulation assembly, and the light homogenizing assembly comprising a PTFE film with microporous structure.

2. The 3D-printed lighting device of claim 1, wherein, The light source assembly comprises: a light source for emitting light; a free-form surface lens located on the light emitting side of the light source and covering the light source, the free-form surface lens being used for converging and dispersing the light emitted by the light source based on different light emitting surfaces; a Fresnel lens located on the side of the free-form surface lens away from the light source in the light transmission direction, the Fresnel lens being used for collimating the light emitted by the free-form surface lens to obtain parallel light.

3. The 3D-printed lighting device of claim 1, wherein, The modulation assembly comprises an LCD or DLP device.

4. A 3D printer characterized by, The application further relates to a 3D printing light source device comprising any one of claims 1-3. The application further relates to a 3D printing light source device comprising any one of claims 1-3.

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